#!/bin/bash
name="abc"
echo $name
echo $1+$2 = `expr $1 + $2`
string="runoob is a great site"
echo `expr index "$string" io`

my_array=(A B "C" D)
echo "数组的元素为: ${my_array[*]}"
echo "数组的元素为: ${my_array[@]}"
